78053399 has 2 divisors, whose sum is σ = 78053400. Its totient is φ = 78053398.

The previous prime is 78053389. The next prime is 78053419. The reversal of 78053399 is 99335087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78053399 - 2⁴ = 78053383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78053389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39026699 + 39026700.

It is an arithmetic number, because the mean of its divisors is an integer number (39026700).

Almost surely, 2^78053399 is an apocalyptic number.

78053399 is a deficient number, since it is larger than the sum of its proper divisors (1).

78053399 is an equidigital number, since it uses as much as digits as its factorization.

78053399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 78053399 is about 8834.7834721627. The cubic root of 78053399 is about 427.3633483644.

The spelling of 78053399 in words is "seventy-eight million, fifty-three thousand, three hundred ninety-nine".